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Bioluminescent Bacterial Imaging In Vivo
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Particulate platform for bioluminescent immunosensing.

Karin Fromell1, Greta Hulting, Alexander Ilichev

  • 1Department of Physical and Analytical Chemistry, Uppsala University, Uppsala, Sweden.

Analytical Chemistry
|September 22, 2007
PubMed
Summary
This summary is machine-generated.

Pyruvate kinase-conjugated antibodies show stability and minimal activity loss for ELISA. These antibody conjugates, when immobilized on nanoparticles, enable sensitive femtomole-level detection in bioluminescence assays.

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Area of Science:

  • Biochemistry
  • Immunotechnology
  • Nanotechnology

Background:

  • Enzyme-conjugated antibodies are crucial for immunoassays.
  • Pyruvate kinase activity and stability are key parameters for its use in assays.
  • Nanoparticles offer a versatile platform for antigen immobilization.

Purpose of the Study:

  • To evaluate pyruvate kinase-conjugated antibodies for ELISA.
  • To assess the stability and activity of pyruvate kinase conjugates.
  • To develop a sensitive bioluminescence immunoassay using nanoparticle-supported antigens.

Main Methods:

  • Conjugation of pyruvate kinase to antibodies.
  • Characterization of conjugate stability and enzyme activity.
  • Immobilization of bovine serum albumin (BSA) antigen onto polystyrene nanoparticles.
  • Development and optimization of a bioluminescence immunoassay.

Main Results:

  • Pyruvate kinase conjugates exhibited acceptable stability.
  • Conjugation resulted in minor impairment of pyruvate kinase activity.
  • Polystyrene nanoparticles served as effective solid supports for antigen presentation.
  • The immunoassay demonstrated a detection limit in the femtomole range.

Conclusions:

  • Pyruvate kinase-conjugated antibodies are suitable for ELISA applications.
  • Nanoparticle-based antigen presentation enhances assay sensitivity.
  • The developed bioluminescence immunoassay offers femtomole-level detection capabilities.